A subway motorman crossing a Co-Op City street in The Bronx shortly after midnight yesterday was struck and killed by a drunken driver, police said.

David Torres, 37, was pronounced dead at the scene and the motorist, David Reed, an off-duty civilian employee of the Drug Enforcement Administration, was arrested, cops said.

Reed, 31, was charged with operating a motor vehicle while under the influence of alcohol, said a spokesman for Bronx District Attorney Robert Johnson.

Elizabeth Jordan, a DEA spokeswoman, said, “It’s a very tragic situation and our sympathy goes out to the family of Mr. Torres.”

She said that Reed, a non-law-enforcement employee in the DEA’s city office, was off-duty and driving his own car.

The DEA “has a very strict policy that prohibits employees from driving a motor vehicle under the influence of alcohol even when driving a personal vehicle in an off-duty status as was apparently the case in this tragedy,” she said.

Torres, a work-train operator who joined the Transit Authority in September 1988, was crossing the Bartow Avenue at Co-Op City Boulevard at 12:25 a.m. when he was hit by the car, which was traveling east on Bartow, police said.

Yesterday, a large white candle in a glass container was left under a tree on the sidewalk just feet from where he died.

On the glass were the words “David, we’ll miss you. We love you. Sue, Teena, Jackie and kids.”

One of Reed’s neighbors at an apartment building on Hutchinson River Parkway described him as “very nice.”

“He always greets us when he sees us,” said next-door neighbor Joanne Ortiz. “He must be so scared.”